Potential answers for "Oil-producing matter in shale"

⭐⭐⭐⭐ KEROGEN
⭐⭐ TALC
⭐⭐ LAMINATES
⭐⭐ SLATE
⭐⭐ KEROSENE
⭐⭐ OILS
⭐⭐ STRATA
⭐⭐ SYNFUEL
⭐⭐ OIL

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